package com.steven.simple;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * 自定义handler需要继承netty中规定好的某个handleradapter
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

   //通道就绪触发方法

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("client:"+ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("你好。。。。",CharsetUtil.UTF_8));
    }
    //当通道有读取事件时，触发

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf byteBuf = (ByteBuf) msg;
        System.out.println("服务器响应："+byteBuf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器地址："+ctx.channel().remoteAddress());
    }


    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
//        super.exceptionCaught(ctx, cause);
    }
}
